Hello, I am a user of Cpanel 62.0 (build 45) and Roundcube. I would like to make a time zone change for all my registered emails at once. I do not have access to the main.inc.php file, is it possible to make this change?
If you don't have access the config file there isn't a way that you can do that.
Actually you can change that without access to the config file,
timezone is read from your login information
when you login the roundcube webmail, the following data is post(using burpsuite you can see)
"_token=wMSUGT3I5nY20J4rTGDOIXsGL75wKRIi&_task=login&_action=login&_timezone=Asia%2FShanghai&_url=&_user=****&_pass=****"
you just need to change "_timezone", and timezone is defined in file
/roundcubemail-1.3.6/program/lib/Roundcube/rcube_config.php